Drill



(No Model.)

[Hm IIIIIHIIHIIHHIIIIII Il Iln J'. o. GODWIN.

DRILL.

1 Patented June 26, 188B.

WITNESSBS INVENTOR I By MMM [IIHIIIHUI N, PETERS. PhnwLHhngr-phm wnhingtan. ELC

ATTORNEYS.

JOHN C. GODWIN, OF ROYSE CITY, TEXAS.

DRILL.

SPECIFICATION forming part of Letters Patent No. 385,111, dated June 26, 1888.

Application iiled November l1, 1887. Serial No.253,963. (No model.)

with the drilling-tool and having a forward and backward turning motion imparted by an especial mechanism.

The invention also consists of certain parts and details and combinations of the same, as

`will be fully described hereinafter, and then pointed out in the claims. l

Reference is to be had to the accompanying drawings, forming a part of this specication, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a plan view of my improvement.

Fig. 2 is a sectional side elevation of the same on the line x x of Fig. l,V and Fig. 3 is a vertical crosssection of the same on the line y y of Fig. 2.

On asuitably-constructed frame, A,is mounted a driving-shaft, B, on which turns loosely a sprocket wheel or pulley, C, connected with a suitable mechanism for imparting motion to the said wheel C. On the hub of the latter is formed a clutch, D, adapt-ed to be engaged by a clutch, E, mounted to slide on and turn with the main shaft B, and also connected with a lever, F, for moving said clutch E in and out of contact with said clutch D, so that the motion imparted to the wheel C is transmitted to the main shaft B or interrupted whenever desired.

On the main shaft 'B are secured two bevel gear-wheels, G and G', between which is held a bevel gear-wheel, H, adapted to be thrown in mesh alternately with said gear-wheels G and G. The bevel gear-wheel His secured to one end of a shaft, I, having its bearing near the said gear-wheel II in asidewise-sliding box, J, provided with a dovetail, J', iittiug in a corresponding groove formed on the main frame A. The other end of the shaft I is provided with a bevel-pinion, K, meshing into a bevel gear-wheel, L, formed on the under side of a disk, N, provided in its center with an opening, N, for the admission of the drill-tool Q, and the said disk N is supported at its under side by studs 0, secured to the main frame A, and by friction-rollers O', mounted to rotate on the said main frame A. The upward move ment of the disk N is prevented by frictionwheels P, engaging the top ofthe said disk N, said friction-wheels P being mounted in arms or brackets P', extending from the main frame A. i

The drilling-tool Q, which passes through the opening N of the disk N, is provided with a clamp, Q', having apertures Q2, through which pass the rods or pins R, secured to the disk N and extending upward, as illustrated in Fig. 2. The pins R permit an up-anddown movement of the drillingtool Q, but prevent a turning movement of the tool Q, unless such movement is imparted by said pins R.

To the sliding bok J of the shaft I is pivotally secured one end of a lever,S,fulcrumed at S to the main frame A, and provided at its upper outer end with an aperture, S2, through which passes loosely a spring-bar, T, fulcrumed at T to the main frame A. On the spring-bar T is held to slide a block, T2, engaging a pin, U', secured to one of the spokes of a wormwheel, U, mounted to rotate horizontally on a suitable stud secured to the main frame A. The worm-whcel U meshes into a worm, V, secured to a shaft,V, mounted transversely in suitable bearings on the main iframe A, and carrying on its outer end a gear-wheel, V, meshing into a gear-wheel, V3, secured "to the main shaft B. y

On the top of the worm-wheel U are secured the pins U2 and U3, placed diametrically opposite each other and at right angles to the pin U', engaging the sliding block T2. The pin U3 can be placed out of the diametrical line with the pin U2 and inserted in one of the apertures U4, formed in the worin-wheel U at each side of the diametrical aperture containing the pin Us, as illustrated in the drawings. The pins U2 and Ua are adapted to engage alternately inclines formed on the under side of a block, W, fastened on one end of a bar,

NV, adapted to slide longitudinally in a suitable bearing formed on the main frame A.

The outer free end of said bar W is adapted to engage one edge of the lever S, so as to lock the latter in position. A' spring, VW, is secured to the main frame A, and its free end presses against the said block W, so as to hold the bar W in an inward position-that is, in contact with one edge ofthe lever S.

The operation is as follows: A rotary motion is imparted to the main shaft B, as above described, whereby the gear-wheel V, meshing into the gear-wheel V2, imparts a similar rotary motion to the shaft V, so that the latter, by the-worm V meshing into the wormwheel U, imparts a rotary motionl to thelatter. The bevel gear-wheel H is in mesh with one of the bevel gear-wheels G or G, and is held in mesh 'by the lever S moving the sliding box J to one side, so that while one gear-wheel, G, is connected with the gear-wheel H the other gear-wheel,G,is disconnected, as shown in Fig. 1. The rotary motion of the shaft B is thus transmitted to the shaft l, and the latter im-- parts, by the pinion K, a rotary motion to the gear-wheel L, formed on the disk N, so that the latter, by its pins R, turns the drill-tool Q. The position ofthe slidingboXJis changed, however, as soon as the worm-wheel U makes a half-revolution-that is, when one of the pins U2 or U3 engages the inclines of the block W, so as to pull the said block, with its bar W, longitudinally inward in the direction of the arrow a', so that the bar W disengages the leverS, and the latter is moved by the action of the spring-bar Tin an opposite direction,so that the box J slides to the opposite side, and the bevel gear-wheel H is thus thrown out of contact with the bevel gear-wheel G aud-thrown in contact with the bevel gear-wheel G. The rotary motionofvthe shaft I is thus reversed, as the said gear-wheel H is rotated in the opposite direction by the gear-wheel G, which engages said gear-wheel H on the side from the gear-wheel G. The pin U', carrying the sliding block T, imparts the necessary tension to the spring-bar T on account of being placed at right angles to the diametrical line in which the pins U2 and U3 are placed, so that on the rotation of the worm-wheel U the block T'l travels to both sides of the longitudinal center line of the machine, whereby the tension of the spring-bar T is first to one side and then to the other side, so that the pressure exerted by the spring-bar T against the-lever S causes the box J to slide first to one side and then to the other, thus throwing the gear-wheel H alternately in contact with the gear-wheels G and G. The motion of the shaft Ibeing reversed, as above described, also reverses the turning motion of the disk N, so that the drilling-tool Q, connected by the pins R and the clamp Q with said disk N, is turned forward and backward, thus changing the line of the cuttingedge of the drilling-tool in the bottom of the hole to be bored. An up-anddown motion is imparted to the drilling-tool Q in the usual manner, the pins R and the cla-mp Q permitting said motion.

The turning motion ofthe disk N can be increased or diminished in extent by inserting the pin U3 into one of the apertures U4, so that the pins Uand U'l are not opposite each other, and the'moving ofthe block W be accomplished after more or less than half a revolution of the worm-wheel U. The spring W2 always forces the block W and its bar W in the inverse direction of the arrow a whenever the respective pin U2 or U3 is disengaged from said block.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. In a drill, a centrally-apertured drilloperating disk provided with pins projecting parallel with its axis for engaging the drill and directly rotating it, substantially as set forth.

2. In a drill, a centrally'apertu red drill-operating disk provided with pins projecting parallel with its axis, in combination with a drill clamp or collar having apertures through which said pins freely pass, substantially as set forth.

3. In a drin, a. disk having a forward and' backward motion and provided with a central aperture, through which passes a drill-tool, in combination with pins secured to said disk and a clamp fastened to the drill-tool and having apertures through which pass said pins, so that the drill-tool can be moved freely up and down, but is turned forward and backward by the said disk, substantially as shown and described.

4.. In a drill, a disk provided with pins and engaging a clamp secured to the drilling-tool, in combination with a gear-wheel formed on said disk, a pinion meshing into said gearwheel, a shaft carrying said pinion, and a seeond pinion fastened on the said shaft and en-A IOO gaging alternately gear-wheels on its sides, so

as to rotate said shaft in opposite directions, substantially as shown and described.

5. In a drill, the combination, with the main shaft carrying two bevel gear-wheels, of a shaft carrying a bevel gear-wheel adapted to be connected alternately with the two bevel gearwheelson said main shaft, a pinion secured on the said shaft, and a disk provided with a bevel gear-wheel meshing in the said pinion, said disk being connected with the drilling-tool, so that the latter can move freely up and down, but is turned by the said disk, substantially as shown and described.

6. In a drill, the combination, with a main shaft carrying two bevel gear-wheels, of a shaft carrying a bevel gear-wheel held between said two bevel gear-wheels on the main shaft, abox adapted to slide and in which said shaft is mounted, a lever pivotally connected with said box, a spring-bar connected with said lever, and a block held to slide on said spring-bar and having a rotary motion, substantially as shown and described.

7. In a drill, the combination, lwith a main shaft carrying two bevel gear-wheels, of a shaft carrying a bevel gear-wheel adapted to be en- IIO IIS

l l l l I@ gztged alternately by the said bevel gear-Wheels on the main shaft, a sliding box in which the said shaft is mounted, a lever pvotally connected with said boX, a. spring-bar connected with said lever, a block sliding on said spring bar, and a Worin-wheel receiving its rotary motion from the main shaft and carrying a, pin engaging` said block, substantie-ll y as shown and described.

8. In 2t drill, the combination, with 2t main shaft carrying two bevel gear-Wheels, of e shaft carrying e, bevel gearwl1ee1 adapted to be engaged alternately by said bevel gear-wheels on the main shaft, a sliding box n which seid shaft is mounted, a lever pivotally connected with' said box, a. spring-bar connected with said lever, a block sliding on said spring-bar, and a. worin-Wheel receiving its rotary motion from the main shaft and carrying a pin engag ing said block, and a bar for locking said lever in position, substantially as Shown and described.

and engaged by said pins, and a bar connected 3 5 with said block and adapted to lock said lever in position, substantially as sliown and described.

JOHN C. GODWIN.

Vi tn eases:

C. B. MCCAFFERTY, F. P. RoYSE. 

